Some people have a rough life in this life. Is it because they have committed crimes in their previous lives and got retribution in this life?

First of all, I'll give you a definite answer to this question. The bumpy fate has nothing to do with my previous life. Karma and reincarnation are some Buddhist sayings. If you believe in Buddhism, you may have such a view, which will bring you the above confusion, but if you are a materialist, you will not have such troubles. From the viewpoint of Marxist materialism, religion and superstition are both reflections of distorting objective facts, unscientific and ignorant. Some people have a rough fate, which is objective and related to their own life experience, family background and growth environment. They can't choose, but these people can change their mentality and be in adversity, but their mentality is positive, and they will get happiness from their own lives and get the motivation to move forward and work hard! Life and destiny will also be changed by yourself! On the contrary, the superstitious idea that you were guilty in your last life and deserved it in this life will become negative, lose confidence in life, and even think that your bad luck and bumpy fate cannot be changed, which will only bring more negative thoughts and adverse consequences! So some people have a rough life, which is by no means retribution or anything. Destiny is in our own hands, and the opportunity to get happiness is also discovered and fought for by ourselves.